https://bugs.freedesktop.org/show_bug.cgi?id=111261
Bug ID: 111261 Summary: Screen remains black when 2 monitors are connected Product: DRI Version: DRI git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu-pro Assignee: dri-devel@lists.freedesktop.org Reporter: fabstz-it@yahoo.fr
With 2 monitors (one on VGA, one on DVI-D), screen turns black while loading system in console When only 1 monitor connected to VGA everything is fine.
There is no problem with kernel 5.2 or with amdpgu-dkms 19.10 on debian buster (linux 4.19)
It happens only with amdpgu-dkms 19.20 or 19.30 (on debian buster - kernel 4.19) For 19.20 I applied my patch from https://bugs.freedesktop.org/show_bug.cgi?id=111103, which is merely the same as the code in 19.30
https://bugs.freedesktop.org/show_bug.cgi?id=111261
--- Comment #1 from Fab Stz fabstz-it@yahoo.fr --- Bug still present in amdgpu-pro-19.30-855429-ubuntu-18.04
Last working version is amdgpu-pro-19.10-785425-ubuntu-18.04
https://bugs.freedesktop.org/show_bug.cgi?id=111261
--- Comment #2 from Alex Deucher alexdeucher@gmail.com --- Please attach your xorg log (if using X) and your dmesg output. What GPU are you using?
https://bugs.freedesktop.org/show_bug.cgi?id=111261
--- Comment #3 from Fab Stz fabstz-it@yahoo.fr --- Thanks for your interest in that issue.
How could I do that with nothing visible on my monitors ? Is there any parameter I can add to the kernel to keep a log ?
https://bugs.freedesktop.org/show_bug.cgi?id=111261
--- Comment #4 from Fab Stz fabstz-it@yahoo.fr --- Created attachment 145098 --> https://bugs.freedesktop.org/attachment.cgi?id=145098&action=edit System information (part1)
Please find attached: - basic configuration details. - addition information
As instructed here : https://amdgpu-install.readthedocs.io/en/latest/install-bugrep.html
https://bugs.freedesktop.org/show_bug.cgi?id=111261
--- Comment #5 from Fab Stz fabstz-it@yahoo.fr --- Created attachment 145101 --> https://bugs.freedesktop.org/attachment.cgi?id=145101&action=edit System information (part2 = logs)
I could get the logs/info through SSH There was no Xorg.log probably because the system didn't start X
There is no dedicated GPU on my system but an APU/CPU with integrated graphics : "AMD Athlon 200GE with vega graphics"
BTW, running kernel 5.2.x was fine (both monitors had something displayed)
https://bugs.freedesktop.org/show_bug.cgi?id=111261
--- Comment #6 from Fab Stz fabstz-it@yahoo.fr --- The issue seems to be related to these calls in file amdgpu-19.30-855429/amd/display/amdgpu_dm/amdgpu_dm.c
twice: kcl_drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
once: kcl_drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux, aconnector->edid);
If I delete them the display works also with 19.30
https://bugs.freedesktop.org/show_bug.cgi?id=111261
Martin Peres martin.peres@free.fr changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |MOVED
--- Comment #7 from Martin Peres martin.peres@free.fr --- -- GitLab Migration Automatic Message --
This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.
You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/36.
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